CN204270091U - A kind of to ring a bell system without wiring based on power line carrier, PLC - Google Patents
A kind of to ring a bell system without wiring based on power line carrier, PLC Download PDFInfo
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- CN204270091U CN204270091U CN201420856021.9U CN201420856021U CN204270091U CN 204270091 U CN204270091 U CN 204270091U CN 201420856021 U CN201420856021 U CN 201420856021U CN 204270091 U CN204270091 U CN 204270091U
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Abstract
The utility model discloses a kind of to ring a bell system without wiring based on power line carrier, PLC, comprise controller and the bell circuit be attached thereto respectively, power line carrier module, power circuit, key circuit and display module, described power circuit is for controller and by controller for remaining component provides power supply; Described controller is established a communications link by power line carrier module and control desk, and controls the action of bell circuit; Described key circuit is used for, to controller input information, input information being shown by display module with Time Controller.This kind system of ringing a bell can meet without the technical requirement of ringing a bell of connecting up, and cost is low, and volume is little.
Description
Technical field
The utility model belongs to communication technical field, and particularly one is based on PLC(power carrier) ringing a bell system without wiring of communicating.
Background technology
Electric bell is indispensable communal facility in our daily life, but the system of ringing a bell of ours is at one's side often too huge loaded down with trivial details, poor operability, and need professional to carry out special construction, maintenance, let us creates larger cost.In order to adapt to productive life, a kind of appearance of simple, convenient, foolproof system of ringing a bell just becomes more urgent.
Traditional system of ringing a bell mainly divides two kinds, one carries out Programming based on controlled programming device to it, and time write of directly ringing a bell is rung a bell in system, as long as the time is once to starting jingle bell in official hour, such benefit is convenient and simple, shortcoming is the time strict conformance needing to guarantee each jingle bell, to avoid the nonsynchronous situation of each jingle bell, ring time will be made like this to become dumb, be difficult to change with the need at any time, so the method that this kind of design is usually only tested in some small-sized places or laboratory and adopted.
The another kind of tradition system of ringing a bell is, by all control lines access master-control room, and on control box, do corresponding adjustment on demand, such dirigibility than before the more said that system of ringing a bell to get well, and have good periodicity, cyclicity, but shortcoming needs to carry out a large amount of wirings, spends larger, also influential system is attractive in appearance to a certain extent, also needs certain maintenance when the later stage uses.
Present system of ringing a bell merges with Campus Broadcasting System again, and it is functionally upgraded to some extent, but cardinal principle and mode of operation are still with similar before, need a lot of wiring, to allow extraneous sound equipment can carry out one-way communication with master-control room, still need a large amount of manpower and financial resources, convenient not.
PLC(Power Line Carrier, power carrier) technology had good development, although the standard that still neither one is unified in the such as problem such as communication protocol and frequency of operation, thus cause between different product compatible poor, but the power line carrier module that same company produces its transmitting range before without power transformation device can reach 1000 meters or farther distance, this can meet some basic communication requirements of productive life, and many major companies have appreciated the good development prospect of power line carrier, PLC gradually, therefore this technology has had good development.
Based on above analysis, the present inventor considers PLC PLC technology to be applied in the system of ringing a bell, and this case produces thus.
Utility model content
The purpose of this utility model, be to provide a kind of to ring a bell system without wiring based on power line carrier, PLC, it can meet without the technical requirement of ringing a bell of connecting up, and cost is low, and volume is little.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of to ring a bell system without wiring based on power line carrier, PLC, comprise controller and the bell circuit be attached thereto respectively, power line carrier module, power circuit, key circuit and display module, described power circuit is for controller and by controller for remaining component provides power supply; Described controller is established a communications link by power line carrier module and control desk, and controls the action of bell circuit; Described key circuit is used for, to controller input information, input information being shown by display module with Time Controller.
Above-mentioned controller adopts 51 single-chip microcomputers, and described 51 single-chip microcomputers also connect reset circuit and clock circuit.
Above-mentioned power line carrier module adopts SENS-01 power line carrier module.
Above-mentioned power line carrier module also connects modulation-demodulation circuit.
Above-mentioned display module adopts LCD12864 chip.
Above-mentioned power circuit adopts L7850 voltage stabilizing chip.
After employing such scheme, electric power carrier communication technology is introduced system of ringing a bell by the utility model, improves the present situation that current system cost of ringing a bell is large, build trouble, be not easy to control.
Accompanying drawing explanation
Fig. 1 is that the signal of the power line carrier, PLC that the utility model adopts sends theory diagram;
Fig. 2 is the Signal reception theory diagram of the power line carrier, PLC that the utility model adopts;
Fig. 3 is the modulation waveform figure of ASK;
Fig. 4 is the control structure figure of ASK;
Fig. 5 is the modulation waveform figure of FSK;
Fig. 6 is the control structure figure of FSK;
Fig. 7 is the modulation waveform figure of PSK;
Fig. 8 is the control structure figure of PSK;
Fig. 9 is integrated stand composition of the present utility model;
Figure 10 is the pin schematic diagram that the utility model adopts single-chip microcomputer;
Figure 11 is that single-chip microcomputer adopts reset circuit schematic diagram;
Figure 12 is that single-chip microcomputer adopts clock circuit schematic diagram;
Figure 13 is the pin schematic diagram of PCF8591 analog-digital chip;
Figure 14 is AD sample circuit schematic diagram;
Figure 15 is DA change-over circuit schematic diagram;
Figure 16 is the pin schematic diagram of MAX232 chip;
Figure 17 is the peripheral circuit schematic diagram of MAX232 chip;
Figure 18 is the circuit diagram of hummer;
Figure 19 is the circuit diagram of jingle bell testing circuit;
Figure 20 is principle of work schematic diagram of the present utility model.
Embodiment
Below with reference to accompanying drawing, the technical solution of the utility model and beneficial effect are described in detail.
Before the technical scheme that this case is described, first introduce the related content of the PLC technology that this case relates to.
Electric power carrier communication technology carries out carrier wave input to line of electric force, using city's electric wire as transmission medium, is the process of signal being carried out to coupling modulation demodulation on line of electric force.Power line carrier, PLC refers to the line of electric force utilizing reality to exist, and is transmitted the signal of our needs by the high-speed transfer of the analog or digital signalling technique of carrier wave.Its maximum feature is simple and convenient, without the need to again setting up new network, as long as on the basis of original line of electric force, just can carry out data transmission.Its shortcoming is can not through transformer coupled, and noise is large, and signal attenuation is large, and needing to carry out special processing could reduce error code.As shown in Figure 1, for the signal of power line carrier, PLC sends theory diagram, after the modulation chip being used for modulating is complete by signal transacting, send into power amplifier, power amplifier couples a signal to line of electric force, and power line carrier receiver will receive coherent signal; It is the Signal reception theory diagram of power line carrier, PLC shown in Fig. 2, signal is sent into traffic filter by coupling mechanism and is carried out signal filtering from line of electric force, filtering interference signals, filtered signal is sent into demodulation chip and is carried out demodulation, and last signal just obtains the signal that we want after amplifying.
In the application of electric power carrier communication technology, the normal mode of digital signal that adopts is modulated, and is wherein embodied as master with keying.According to the difference of different carrier signal parameter control modes, ASK(amplitude shift keying can be divided into), FSK(frequency shift keying), PSK(phase-shift keying (PSK)) and narrow-band digital modulation etc.Be below the contrast introduction of various modulation system relative merits:
ASK: amplitude shift keying, this debud mode modulation /demodulation is simple and convenient, but and the low-power transmission be not suitable on line of electric force, because the noise on line of electric force is comparatively large, directly will has influence on the amplitude of receiver, cause loading error occurring, specifically as shown in Figure 3 and Figure 4.
FSK: utilizing binary digital baseband signal to control to make to carry wave frequency difference is frequency shift keying, needs to carry out Spectrum Conversion at this; The current domestic application of this technology is more, and its analogy and digital circuit is easy to realize, because above-mentioned technology does not need too complicated phase-locked coupling and carrier synchronization, so all very little to the resource requirement of hardware and software; Therefore, before ultra-large asic technology does not have widespread use, adopt the leading position of the long-term occuping market of the product of this type of technology, specifically as shown in Figure 5 and Figure 6.
PSK: carry out phase control continuous carrier system by binary digit baseband signal is phase keying system, and this process is the process of carrying out Spectrum Conversion; Binary data is utilized between 0-180 degree, to switch to the phase place controlling carrier wave the zero phase angle carrying out modulated carrier, in amplitude or frequency influence, phase-shift keying (PSK) is not responsive especially, in modulator approaches all at present, is minimum to the susceptibility of broadband noise PSK; In whole transmitting procedure, only need the carrier wave of an employing fixed frequency, therefore data rate to bandwidth ratio is also relatively high; But the phase-shift detection technical sophistication of receiving end also costly, specifically as shown in Figure 7 and Figure 8.
Generally speaking, under identical signal to noise ratio (S/N ratio), the bit error rate of relevant 2PSK is minimum; The bit error rate of FSK is far above PSK mode.So the representative of current up-to-date mechanics of communication is phase-shift keying (PSK), in the association area of wireless telecommunications and carrier communication, state-of-the-art technology all unanimously selects PSK mode.
The utility model provides a kind of to ring a bell system without wiring based on power line carrier, PLC, as shown in Fig. 9 and Figure 20, comprise controller and the bell circuit be attached thereto respectively, power line carrier module, power circuit, key circuit and display module, introduce respectively below.
Controller realizes the control to whole system, and in the present embodiment, adopt 51 single-chip microcomputers to complete, specifically select domestic macrocrystalline STC single-chip microcomputer, its pin schematic diagram as shown in Figure 10.The peripheral circuit of this single-chip microcomputer mainly contains reset circuit and clock circuit, wherein, reset circuit is as Figure 11, employing high level resets, but its reset level will continue at least two Machine cycles could really be resetted, so the value conventional when selecting resistance capacitance has: RDZ=1K Ω, electric capacity has C=10 ~ 30uF, and it need meet following formula: t=RCln (Vrst/Vth).This circuit also has the function of hand-reset in addition, and when hand pushes button, RST just becomes high level, because staff reaction velocity is comparatively slow, has had enough reset times, so can ensure the reset of single-chip microcomputer completely.Clock circuit is as Figure 12: the travelling speed of single-chip microcomputer is exactly mainly see the size of clock circuit oscillation frequency, and its whether stable quality being also directly connected to single-chip microcomputer work.51 single-chip microcomputer crystal oscillators have 6M, 12M, 11.0592M etc. under normal circumstances, wherein in counting in order to accurately handy, usually select 12M and 6M crystal oscillator, and 11.0592M is usually used in serial communication as two electric capacity is tremble ripple to remove a part.Select 22P at this according to the requirement electric capacity of system, crystal oscillator select 11.0592M with the use of.
In addition, according to single-chip microcomputer internal circuit design, we often need the pull-up resistor adding 1K to PO mouth, and because we do not need external memory storage, so EA/VPP pin should be connect high level.Connect low level as external interrupt, this circuit is to coordinate button to use, and is not the necessary external circuit of single-chip microcomputer.
Described single-chip microcomputer also connects AD/DA sampling module, specifically selects PCF8591 analog-digital chip, and its pin schematic diagram is as Figure 13, and this chip is a single-chip integration, independently-powered, circuit low-power consumption, eight cmos data AD/DA conversion devices.PCF8591 has 4 mock survey ports, 1 modulating output pin and 1 universal serial bus I2C interface.3 address pin A0, A1 and the A2 of PCF8591 also can use software programming by hardware programming, and allowing is having 8 PCF8591 devices to access with in individual I2C bus, and without the need to extra hardware configuration.The address of input and output on PCF8591 device, to control and data signal be all transmitted in a serial fashion by the two-way I2C bus of two-wire.
As shown in Figure 14 and Figure 15, the schematic diagram of AD sample circuit and DA change-over circuit respectively, the conversion of a responsible simulating signal, one is be converted into simulating signal, whether normally work for test circuit, and the speed of test circuit inbound pacing, this circuit is also to prove that simulating signal can be transmitted by line of electric force, also demonstrating the feasibility of power line carrier, PLC broadcast transmission in addition.But due to the restriction in speed, so check when can consider multiple power line carrier module difference, receive during difference, then detect the voice signal of needs with filtering circuit.And the slide rheostat shown on this circuit and LED bright be secretly change in order to analog waveform, be also to check whether signal shakes hands successfully.
In the present embodiment, power line carrier module adopts SENS-01 power line carrier module, and it adopts half duplex communication, adopts the modulation system of zero passage bimodulus, and module uses carrier frequency to be 290KHz/125kHz, for realizing the communication between controller and control desk.
Described power line carrier module also connects modulation-demodulation circuit, in the present embodiment, the serial communication of computer is utilized to realize modulation /demodulation, because the level of computer and single-chip microcomputer can not be compatible, therefore the MAX232 chip that Maxim is produced is adopted, its pin schematic diagram is as Figure 16, and its peripheral circuit as shown in figure 17.
Key circuit is connected with controller, controlling and selection function for realizing, in the present embodiment, being specifically provided with 4 buttons, realize selection to menu, determine different working methods, the functions such as timetable, waveform debugging and timing are rung a bell in confirmed standard time, change.
Display module is connected with controller, for display menu catalogue under the control of the controller.In the present embodiment, LCD12864 chip can be adopted, and adopt serial interface method.
Described power circuit is used for providing power supply for assembly each in native system, in the present embodiment, can select L7850 voltage stabilizing chip.
Bell circuit is connected with controller, for ringing a bell under the control of the controller, comprise hummer and jingle bell testing circuit, respectively as shown in Figure 18 and Figure 19, wherein, the triode in Figure 18 can select 9014 triodes, and the saturation voltage value between its collector and emitter is Vceo=0.25V, Ic=1mA, and base resistance selects the resistance of 5K Ω.
Above embodiment is only and technological thought of the present utility model is described; protection domain of the present utility model can not be limited with this; every technological thought according to the utility model proposes, any change that technical scheme basis is done, all falls within the utility model protection domain.
Claims (6)
1. to ring a bell system without wiring based on power line carrier, PLC, it is characterized in that: comprise controller and the bell circuit be attached thereto respectively, power line carrier module, power circuit, key circuit and display module, described power circuit is for controller and by controller for remaining component provides power supply; Described controller is established a communications link by power line carrier module and control desk, and controls the action of bell circuit; Described key circuit is used for, to controller input information, input information being shown by display module with Time Controller.
2. a kind of to ring a bell system without wiring based on power line carrier, PLC as claimed in claim 1, it is characterized in that: described controller adopts 51 single-chip microcomputers, described 51 single-chip microcomputers also connect reset circuit and clock circuit.
3. a kind of to ring a bell system without wiring based on power line carrier, PLC as claimed in claim 1, is characterized in that: described power line carrier module adopts SENS-01 power line carrier module.
4. a kind of to ring a bell system without wiring based on power line carrier, PLC as claimed in claim 1, is characterized in that: described power line carrier module also connects modulation-demodulation circuit.
5. a kind of to ring a bell system without wiring based on power line carrier, PLC as claimed in claim 1, is characterized in that: described display module adopts LCD12864 chip.
6. a kind of to ring a bell system without wiring based on power line carrier, PLC as claimed in claim 1, is characterized in that: described power circuit adopts L7850 voltage stabilizing chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420856021.9U CN204270091U (en) | 2014-12-30 | 2014-12-30 | A kind of to ring a bell system without wiring based on power line carrier, PLC |
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| CN201420856021.9U CN204270091U (en) | 2014-12-30 | 2014-12-30 | A kind of to ring a bell system without wiring based on power line carrier, PLC |
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| CN204270091U true CN204270091U (en) | 2015-04-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656517A (en) * | 2016-03-10 | 2016-06-08 | 厦门理工学院 | Island information transmission measurement and control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656517A (en) * | 2016-03-10 | 2016-06-08 | 厦门理工学院 | Island information transmission measurement and control system |
| CN105656517B (en) * | 2016-03-10 | 2023-04-11 | 厦门理工学院 | Island information transmission measurement and control system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231102 Address after: 503A, Building B, Phase I, Taidi Haixi Center, No. 893, Haicang Avenue, Haicang District, Xiamen, Fujian, 361026 Patentee after: Xiamen Xiabo Electronic Technology Co.,Ltd. Address before: 361024 No. 600, science and engineering road, Jimei District, Fujian, Xiamen Patentee before: XIAMEN University OF TECHNOLOGY |
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| TR01 | Transfer of patent right |